On Tue, Nov 27, 2012 at 11:59:57PM -0500, CAI Qian wrote: > sata_svw: check DMA start bit before reset > > If kdump is triggered with pending IO, controller may not respond causing > kdump to fail. > > http://marc.info/?l=linux-ide&m=133032255424658&w=2 > > During error recovery ata_do_dev_read_id never completes due hang > in mmio_insw. > > ata_do_dev_read_id > ata_sff_data_xfer > ioread16_rep > mmio_insw > > if DMA start bit is cleared before reset, PIO command is successful > and kdump succeeds. > > Signed-off-by: David Milburn <[email protected]> > Signed-off-by: Jeff Garzik <[email protected]> > > Upstream-ID: b03e66a6be91f8389fcd902ab6c1563db1c9c06b > Stable-trees: 3.0.x, 3.4.x, 3.6.x > Signed-off-by: CAI Qian <[email protected]>
Any reason why you sent this twice? greg k-h -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
